Which term describes a line graph showing the discharge of a river over time?

Which term describes a line graph showing the discharge of a river over time?

• A. Managed retreat
• B. Non-government aid
• C. Hydrograph
• D. Pull factors

Answer: (C)

A hydrograph is used to show how river discharge changes over time. It’s a line graph with time on the horizontal axis and discharge (the volume of water flowing past a point per second) on the vertical axis, illustrating how a river responds to rainfall with a rising limb, a peak, and a falling limb as baseflow returns. The other terms refer to unrelated concepts—managed retreat is coastal adaptation, non-government aid is assistance from NGOs, and pull factors are reasons for migration—so they don’t describe this kind of hydrological graph.

A hydrograph is used to show how river discharge changes over time. It’s a line graph with time on the horizontal axis and discharge (the volume of water flowing past a point per second) on the vertical axis, illustrating how a river responds to rainfall with a rising limb, a peak, and a falling limb as baseflow returns. The other terms refer to unrelated concepts—managed retreat is coastal adaptation, non-government aid is assistance from NGOs, and pull factors are reasons for migration—so they don’t describe this kind of hydrological graph.